Cannot publish WebHelp project

I'm using Robohelp HTML 7 and can't publish a project. I was able to generate and publish it once, but can only generate now. After generating the webhelp, I click on Publish and then nothing. No error messages or popups. Zilch.

I'm able to generate and publish another project without any problems. I have tried emptying the folder on the server, as well as restarting RH and the computer. I have all required permissions to the server.

Anything else I shoud try? Has anyone seen this before? Thanks for your help!